# NTSB MKC81FCD14: Mooney M20K, N9766S, Iowa City, IA, April 9, 1981

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: April 9, 1981
- Place: Iowa City, IA · IOWA CITY, IA
- Location: 41.6557° N, 91.5309° W: Placed by OpenAirDocs: center of Iowa City, IA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.6557&lon=-91.5309&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report April 27, 1981
- Report: Brief approved by the director
- NTSB case key (mKey): 126556
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC81FCD14
- Page: https://openairdocs.org/ntsb/MKC81FCD14

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1077   81/4/9    IOWA CITY,IA        MOONEY M20K         CR-  0  1  0  NONCOMMERCIAL             PRIVATE, AGE 30, 266
        TIME - 1205                    N9766S              PX-  0  0  0  BUSINESS                  TOTAL HOURS, 9 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - MUNI
        DEPARTURE POINT             INTENDED DESTINATION
          MINNEAPOLIS,MN              IOWA CITY,IA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            LANDING: TRAFFIC PATTERN-CIRCLING
           COLLISION WITH GROUND/WATER: CONTROLLED                  LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
           POWERPLANT - LUBRICATING SYSTEM: PUMP-PRESSURE
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- STEEL WASHER FOUND IN OIL PUMP CASE AREA,DRIVE SHAFT & WOODRUFF KEY SHEARED.ACFT TOTAL TIME 20HRS.
```

## Aircraft

- Registration: N9766S (not matched to a registry record)
- Reported make and model: MOONEY M20K
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Muni

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19810409015789A](https://openairdocs.org/incident/19810409015789A), Apr 9, 1981: Mooney M20A, Iowa City, IA, Substantial damage. Engine failed & crash occurred during emergency landing. Washer was found in oil pump gear. Caused shaft to shear.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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